NSU Prima III: history, specs, pictures

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NSU Prima III
Manufacturer
NSU
Also called Prima III K
Production 1957 - 1964
Engine
single cylinder, two-stroke
Bore / Stroke 57.0mm x 57.6mm
Top Speed 52 mph (84 km/h)
Horsepower 7.51 HP (5.6 KW) @ 5200RPM
Fuel System carburetor
Ignition magneto
Transmission Gear box: 4-speed
Final Drive: shaft drive (cardan)
Brakes Front: expanding brake (drum brake)
Rear: expanding brake (drum brake)
Front Tire 3.50-10
Rear Tire 3.50-10
Length 70.08 inches (1780 mm)
Width 25.59 inches (650 mm)
Height 37.99 inches (965 mm)
Weight 288.81 pounds (131.0 Kg) (dry),
Fuel Capacity 3.17 Gallon (12.00 Liters)
Fuel Consumption 2.50 liters/100 km (40.0 km/l or 94.09 mpg)
Manuals Service Manual


The NSU Prima III K was a single cylinder, two-stroke standard produced by NSU between 1957 and 1964. It could reach a top speed of 52 mph (84 km/h). Claimed horsepower was 7.51 HP (5.6 KW) @ 5200 RPM.

Engine[edit | edit source]

The engine was a air cooled single cylinder, two-stroke. A 57.0mm bore x 57.6mm stroke result in a displacement of just 146.0 cubic centimeters.

Drive[edit | edit source]

The bike has a 4-speed transmission.

Chassis[edit | edit source]

It came with a 3.50-10 front tire and a 3.50-10 rear tire. Stopping was achieved via expanding brake (drum brake) in the front and a expanding brake (drum brake) in the rear. The Prima III K was fitted with a 3.17 Gallon (12.00 Liters) fuel tank. The bike weighed just 288.81 pounds (131.0 Kg).